Riley O'Brien or William Kempner

Baseball Stats Comparison

Stats
Projections
News & Notes
Schedule

Riley O'Brien or William Kempner Player Statistics
	Riley O'Brien RP - STL	William Kempner RP - MIA
2026 Stats


Games Played	58	9

Games Started	0	0

Innings Pitched	56.0	12.1

Wins	3	1

Losses	7	0

Saves	35	0

Blown Saves	6	0

Holds	1	0

Hits Allowed	46	8

Earned Runs	26	4

Home Runs Allowed	3	1

Strikeouts	55	14

Walks	24	4

ERA	4.18	2.92

WHIP	1.25	0.97

Riley O'Brien or William Kempner Player Projections
	Riley O'Brien RP - STL	William Kempner RP - MIA
2026 Projections


Games Played	59	21

Games Started	0	0

Innings Pitched	60.2	21.5

Wins	3	1

Losses	3	2

Saves	14	0

Blown Saves	1	0

Holds	11	1

Hits Allowed	52	20

Earned Runs	26	11

Home Runs Allowed	5	3

Strikeouts	63	21

Walks	27	12

ERA	3.92	4.71

WHIP	1.31	1.48

Riley O'Brien or William Kempner Player Notes
	Riley O'Brien RP - STL	William Kempner RP - MIA
News
	Riley O'Brien struck out one batter while allowing the ghost runner to score to earn the save in Wednesday's 8-6 win over the Dodgers. Chase Davis Thu, Sep 3rd	William Kempner has continued his non-throwing rehab. Ari Koslow Thu, Sep 3rd
	Riley O'Brien struck out one batter while allowing one hit in a scoreless appearance to earn the save in Thursday's 7-5 win over the Orioles. Chase Davis Fri, Aug 28th	The Marlins transferred William Kempner to the 60-day injured list. Ari Koslow Fri, Aug 21st
	Riley O'Brien recorded one out while allowing a hit and two walks to record his 33rd save of the season in Thursday's win against the Reds. Chase Davis Fri, Aug 21st	William Kempner was scheduled to undergo surgery on Wednesday. Ari Koslow Thu, Aug 20th
	Riley O'Brien struck out one batter in a scoreless outing to earn the save in Tuesday's 3-0 win over the Reds. Chase Davis Wed, Aug 19th	William Kempner is scheduled to undergo elbow surgery. Ari Koslow Wed, Aug 12th
	Riley O'Brien picked up the save in a clean ninth inning, striking out three batters on 14 pitches. Chase Davis Tue, Aug 18th	The Marlins say William Kempner will be re-evaluated next week. Ari Koslow Fri, Aug 7th
Notes
There are no recent notes for these players

Riley O'Brien or William Kempner Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Riley O'Brien RP - STL			William Kempner RP - MIA
Thu, Mar 26th	vs TB	Drew Rasmussen (14-5)	#22
Sat, Mar 28th	vs TB	Joe Boyle (0-1)	#196	vs COL	Michael Lorenzen (3-11)	#162
Sun, Mar 29th	vs TB	Steven Matz (5-4)	#192	vs COL	Jose Quintana (2-3)	#424
Mon, Mar 30th	vs NYM	Clay Holmes (6-6)	#52	vs CWS	Davis Martin (9-6)	#110
Tue, Mar 31st	vs NYM	Kodai Senga (0-9)	#72	vs CWS	Erick Fedde (7-8)	#422
Wed, Apr 1st	vs NYM	Freddy Peralta (7-11)	#38	vs CWS	Shane Smith (0-2)	#258
Fri, Apr 3rd	@ DET	Framber Valdez (8-10)	#35	@ NYY	Will Warren (9-6)	#50
Sat, Apr 4th	@ DET	Jack Flaherty (3-8)	#95	@ NYY	Ryan Weathers (5-8)	#215
Sun, Apr 5th	@ DET	Keider Montero (9-8)	#139	@ NYY	Max Fried (4-4)	#18
Mon, Apr 6th	@ WSH	Zack Littell (8-8)	#361	vs CIN	Brandon Williamson (3-3)	#391
Tue, Apr 7th	@ WSH	Cade Cavalli (12-5)	#54	vs CIN	Andrew Abbott (6-10)	#150
Wed, Apr 8th	@ WSH	Miles Mikolas (3-9)		vs CIN	Brady Singer (5-13)	#187
Fri, Apr 10th	vs BOS	Connelly Early (7-5)	#123	@ DET	Keider Montero (9-8)	#139
Sat, Apr 11th	vs BOS	Ranger Suarez (5-4)	#28	@ DET	Casey Mize (5-9)	#60
Sun, Apr 12th	vs BOS	Brayan Bello (5-7)	#132	@ DET	Tarik Skubal (8-7)	#2
Mon, Apr 13th	vs CLE	Gavin Williams (13-7)	#17	@ ATL	Grant Holmes (9-5)	#186
Tue, Apr 14th	vs CLE	Joey Cantillo (9-8)	#73	@ ATL	Reynaldo Lopez (4-3)	#119
Wed, Apr 15th	vs CLE	Slade Cecconi (4-7)	#206	@ ATL	Bryce Elder (8-8)	#170
Fri, Apr 17th	@ HOU	Peter Lambert (8-7)	#142	vs MIL	Coleman Crow (0-1)	#335
Sat, Apr 18th	@ HOU	Lance McCullers Jr. (2-3)		vs MIL	Brandon Woodruff (2-2)
Sun, Apr 19th	@ HOU	Mike Burrows (4-9)	#298	vs MIL	Jacob Misiorowski (14-5)	#5
Mon, Apr 20th	@ MIA	Max Meyer (9-1)		vs STL	Michael McGreevy (6-9)	#112
Tue, Apr 21st	@ MIA	Chris Paddack (0-7)		vs STL	Dustin May (6-9)	#45
Wed, Apr 22nd	@ MIA	Janson Junk (6-8)	#109	vs STL	Kyle Leahy (10-4)	#90
Fri, Apr 24th	vs SEA	George Kirby (9-10)	#20	@ SF	Adrian Houser (4-7)	#375
Sat, Apr 25th	vs SEA	Bryan Woo (10-9)	#13	@ SF	Robbie Ray (11-7)	#114
Sun, Apr 26th	vs SEA	Emerson Hancock (7-8)	#127	@ SF	Landen Roupp (8-13)	#97
Mon, Apr 27th	@ PIT	Mason Montgomery (6-3)	#64	@ LAD	Yoshinobu Yamamoto (12-8)	#10
Tue, Apr 28th	@ PIT	Braxton Ashcraft (14-5)	#25	@ LAD	Shohei Ohtani (8-2)	#1
Wed, Apr 29th	@ PIT	Bubba Chandler (6-9)	#128	@ LAD	Tyler Glasnow (4-0)	#16
Thu, Apr 30th	@ PIT	Paul Skenes (9-11)	#3
Fri, May 1st	vs LAD	Emmet Sheehan (4-8)	#89	vs PHI	Zack Wheeler (11-5)	#11
Sat, May 2nd	vs LAD	Roki Sasaki (5-5)	#124	vs PHI	Andrew Painter (3-8)	#171
Sun, May 3rd	vs LAD	Justin Wrobleski (11-5)	#118	vs PHI	Jesus Luzardo (13-5)	#9
Mon, May 4th	vs MIL	Chad Patrick (7-4)	#113	vs PHI	Aaron Nola (6-10)	#65
Wed, May 6th	vs MIL	Brandon Sproat (3-7)	#238	vs BAL	Brandon Young (9-3)	#138
Thu, May 7th	@ SD	Michael King (9-9)	#59	vs BAL	Cade Povich (2-1)	#253
Fri, May 8th	@ SD	Griffin Canning (4-9)	#198	vs WSH	Foster Griffin (15-4)	#56
Sat, May 9th	@ SD	Randy Vasquez (10-6)	#213	vs WSH	Richard Lovelady (2-4)	#272
Sun, May 10th	@ SD	Walker Buehler (8-6)	#184	vs WSH	Cade Cavalli (12-5)	#54
Tue, May 12th	@ ATH	Jeffrey Springs (3-13)	#261	@ MIN	Bailey Ober (7-4)	#96
Wed, May 13th	@ ATH	J.T. Ginn (9-8)	#151	@ MIN	Simeon Woods Richardson (2-7)	#314
Thu, May 14th	@ ATH	Jacob Lopez (6-4)	#153	@ MIN	Zebby Matthews (9-8)	#94
Fri, May 15th	vs KC	Michael Wacha (9-8)	#75	@ TB	Ian Seymour (9-6)	#58
Sat, May 16th	vs KC	Noah Cameron (9-8)	#83	@ TB	Nick Martinez (13-4)	#92
Sun, May 17th	vs KC	Stephen Kolek (4-3)		@ TB	Drew Rasmussen (14-5)	#22
Tue, May 19th	vs PIT	Mitch Keller (6-8)		vs ATL	Martin Perez (8-8)	#191
Wed, May 20th	vs PIT	Carmen Mlodzinski (7-6)	#104	vs ATL	Chris Sale (13-9)	#8
Thu, May 21st	vs PIT	Braxton Ashcraft (14-5)	#25	vs ATL	Spencer Strider (4-2)	#255
Sat, May 23rd	@ CIN	Chase Petty (1-2)	#427	vs NYM	Freddy Peralta (7-11)	#38
Mon, May 25th	@ MIL	Jacob Misiorowski (14-5)	#5	@ TOR	Trey Yesavage (5-5)	#207
Tue, May 26th	@ MIL	Kyle Harrison (10-4)	#57	@ TOR	Braydon Fisher (3-4)	#140
Wed, May 27th	@ MIL	Chad Patrick (7-4)	#113	@ TOR	Kevin Gausman (9-11)	#24
Fri, May 29th	vs CHC	Shota Imanaga (8-10)	#27	@ NYM	Freddy Peralta (7-11)	#38
Sat, May 30th	vs CHC	Ben Brown (4-2)	#180	@ NYM	Christian Scott (4-4)	#53
Sun, May 31st	vs CHC	Jordan Wicks (0-2)	#307	@ NYM	Nolan McLean (10-8)	#30
Mon, Jun 1st	vs TEX	Jacob deGrom (10-9)	#6	@ WSH	Cade Cavalli (12-5)	#54
Tue, Jun 2nd	vs TEX	Nathan Eovaldi (10-9)	#82	@ WSH	Richard Lovelady (2-4)	#272
Wed, Jun 3rd	vs TEX	MacKenzie Gore (8-10)	#48	@ WSH	Andrew Alvarez (2-6)	#134
Fri, Jun 5th	vs CIN	Brady Singer (5-13)	#187	vs TB	Drew Rasmussen (14-5)	#22
Sat, Jun 6th	vs CIN	Nick Lodolo (3-3)	#120	vs TB	Shane McClanahan (10-7)	#43
Sun, Jun 7th	vs CIN	Rhett Lowder (6-8)	#214	vs TB	Griffin Jax (6-10)	#66
Tue, Jun 9th	@ NYM	Freddy Peralta (7-11)	#38	vs ARI	Zac Gallen (3-9)	#164
Wed, Jun 10th	@ NYM	Austin Warren		vs ARI	Ryne Nelson (3-5)	#254
Thu, Jun 11th	@ NYM	Christian Scott (4-4)	#53	vs ARI	Merrill Kelly (9-12)	#176
Fri, Jun 12th	@ MIN	Joe Ryan (6-8)	#61	@ PIT	Braxton Ashcraft (14-5)	#25
Sat, Jun 13th	@ MIN	Connor Prielipp (4-7)	#71	@ PIT	Bubba Chandler (6-9)	#128
Sun, Jun 14th	@ MIN	Taj Bradley (10-6)	#51	@ PIT	Paul Skenes (9-11)	#3
Mon, Jun 15th	vs SD	Wandy Peralta (2-2)	#183	@ PHI	Zack Wheeler (11-5)	#11
Tue, Jun 16th	vs SD	Michael King (9-9)	#59	@ PHI	Jesus Luzardo (13-5)	#9
Wed, Jun 17th	vs SD	Bradgley Rodriguez (3-3)	#91	@ PHI	Andrew Painter (3-8)	#171
Thu, Jun 18th	@ KC	Noah Cameron (9-8)	#83
Fri, Jun 19th	@ KC	Seth Lugo (6-8)	#158	vs SF	Landen Roupp (8-13)	#97
Sun, Jun 21st	@ KC	Stephen Kolek (4-3)		vs SF	Logan Webb (8-8)	#21
Mon, Jun 22nd	vs ARI	Merrill Kelly (9-12)	#176	vs TEX	Tyler Alexander (5-2)	#135
Tue, Jun 23rd	vs ARI	Eduardo Rodriguez (14-5)	#125	vs TEX	Cal Quantrill (7-5)	#188
Wed, Jun 24th	vs ARI	Mitch Bratt (1-3)	#302	vs TEX	Jacob deGrom (10-9)	#6
Fri, Jun 26th	vs MIA	Max Meyer (9-1)		@ STL	Michael McGreevy (6-9)	#112
Sat, Jun 27th	vs MIA	Ryan Gusto (1-3)	#148	@ STL	Andre Pallante (12-6)	#294
Sun, Jun 28th	vs MIA	Tyler Phillips (4-6)	#225	@ STL	Kyle Leahy (10-4)	#90
Tue, Jun 30th	@ ATL	Martin Perez (8-8)	#191	@ COL	Tanner Gordon (1-4)	#420
Wed, Jul 1st	@ ATL	Reynaldo Lopez (4-3)	#119	@ COL	Kyle Freeland (4-10)	#394
Thu, Jul 2nd	@ ATL	Hurston Waldrep (0-1)		@ COL	Michael Lorenzen (3-11)	#162
Fri, Jul 3rd	@ CHC	David Peterson (7-8)	#103	@ ATH	Jack Perkins (3-10)	#141
Sat, Jul 4th	@ CHC	Shota Imanaga (8-10)	#27	@ ATH	Aaron Civale (6-7)	#193
Sun, Jul 5th	@ CHC	Javier Assad (6-1)	#274	@ ATH	Gage Jump (6-9)	#106
Mon, Jul 6th	vs MIL	Shane Drohan (7-5)	#107
Tue, Jul 7th	vs MIL	Robert Gasser (4-5)	#87	vs SEA	Bryan Woo (10-9)	#13
Wed, Jul 8th	vs MIL	Kyle Harrison (10-4)	#57	vs SEA	George Kirby (9-10)	#20
Thu, Jul 9th	vs MIL	Logan Henderson (9-3)	#26	vs SEA	Bryce Miller (4-8)	#46
Fri, Jul 10th	vs ATL	Chris Sale (13-9)	#8	vs CLE	Parker Messick (11-8)	#32
Sat, Jul 11th	vs ATL	Reynaldo Lopez (4-3)	#119	vs CLE	Tanner Bibee (5-15)	#63
Sun, Jul 12th	vs ATL	Danny Young		vs CLE	Joey Cantillo (9-8)	#73
Fri, Jul 17th	@ ARI	Merrill Kelly (9-12)	#176	@ MIL	Logan Henderson (9-3)	#26
Sat, Jul 18th	@ ARI	Brandon Pfaadt (7-2)	#116	@ MIL	Shane Drohan (7-5)	#107
Sun, Jul 19th	@ ARI	Eduardo Rodriguez (14-5)	#125	@ MIL	Robert Gasser (4-5)	#87
Mon, Jul 20th	@ LAA	Jose Soriano (11-7)	#33	@ HOU	Ronel Blanco (0-1)	#143
Tue, Jul 21st	@ LAA	Walbert Urena (9-9)	#210	@ HOU	Tatsuya Imai (6-4)	#131
Wed, Jul 22nd	@ LAA	Reid Detmers (4-8)	#36	@ HOU	Peter Lambert (8-7)	#142
Thu, Jul 23rd	vs ARI	Brandon Pfaadt (7-2)	#116
Fri, Jul 24th	vs CIN	Rhett Lowder (6-8)	#214	vs SD	German Marquez (4-2)	#374
Sat, Jul 25th	vs CIN	Hunter Greene (2-2)		vs SD	Randy Vasquez (10-6)	#213
Sun, Jul 26th	vs CIN	Andrew Abbott (6-10)	#150	vs SD	Walker Buehler (8-6)	#184
Mon, Jul 27th	vs CHC	David Peterson (7-8)	#103	vs PHI	Zack Wheeler (11-5)	#11
Tue, Jul 28th	vs CHC	Colin Rea (8-8)	#156	vs PHI	Aaron Nola (6-10)	#65
Wed, Jul 29th	vs CHC	Matthew Boyd (8-3)	#37	vs PHI	Jesus Luzardo (13-5)	#9
Thu, Jul 30th	vs CHC	Javier Assad (6-1)	#274	@ NYM	Nolan McLean (10-8)	#30
Fri, Jul 31st	@ TOR	Dylan Cease (10-5)	#7	@ NYM	Kodai Senga (0-9)	#72
Sat, Aug 1st	@ TOR	Kevin Gausman (9-11)	#24	@ NYM	Zac Thornton (3-4)	#115
Sun, Aug 2nd	@ TOR	Max Scherzer (2-7)	#122	@ NYM	Robert Stock (1-3)	#174
Mon, Aug 3rd	@ NYY	Cam Schlittler (12-6)	#15
Tue, Aug 4th	@ NYY	Ryan Weathers (5-8)	#215	@ ATL	Grant Holmes (9-5)	#186
Wed, Aug 5th	@ NYY	Will Warren (9-6)	#50	@ ATL	Bryce Elder (8-8)	#170
Fri, Aug 7th	vs COL	Ryan Feltner (5-9)	#431	vs LAA	George Klassen (2-2)	#387
Sat, Aug 8th	vs COL	Kyle Freeland (4-10)	#394	vs LAA	Walbert Urena (9-9)	#210
Sun, Aug 9th	vs COL	Michael Lorenzen (3-11)	#162	vs LAA	Grayson Rodriguez (4-6)	#101
Mon, Aug 10th	vs PHI	Andrew Painter (3-8)	#171
Tue, Aug 11th	vs PHI	Cristopher Sanchez (16-4)	#4	vs PIT	Paul Skenes (9-11)	#3
Wed, Aug 12th	vs PHI	Zack Wheeler (11-5)	#11	vs PIT	Carmen Mlodzinski (7-6)	#104
Fri, Aug 14th	@ CHC	Clay Holmes (6-6)	#52	@ CIN	Chase Burns (15-3)	#41
Sat, Aug 15th	@ CHC	Matthew Boyd (8-3)	#37	@ CIN	Brady Singer (5-13)	#187
Sun, Aug 16th	@ CHC	Edward Cabrera (5-5)	#108	@ CIN	Nick Lodolo (3-3)	#120
Mon, Aug 17th	@ CIN	Rhett Lowder (6-8)	#214	@ PHI	Cristopher Sanchez (16-4)	#4
Tue, Aug 18th	@ CIN	Andrew Abbott (6-10)	#150	@ PHI	Zack Wheeler (11-5)	#11
Wed, Aug 19th	@ CIN	Chase Burns (15-3)	#41	@ PHI	Aaron Nola (6-10)	#65
Thu, Aug 20th	@ CIN	Brady Singer (5-13)	#187
Fri, Aug 21st	@ PHI	Jesus Luzardo (13-5)	#9	vs WSH	Brad Lord (5-2)	#203
Sat, Aug 22nd	@ PHI	Andrew Painter (3-8)	#171	vs WSH	Jake Irvin (2-8)	#166
Sun, Aug 23rd	@ PHI	Cristopher Sanchez (16-4)	#4	vs WSH	Jackson Kent (1-2)	#177
Tue, Aug 25th	vs BAL	Chris Bassitt (6-4)	#154	vs BOS	Payton Tolle (8-6)	#34
Wed, Aug 26th	vs BAL	Kyle Bradish (7-12)	#42	vs BOS	Sonny Gray (16-4)	#29
Thu, Aug 27th	vs BAL	Trevor Rogers (9-9)	#39
Fri, Aug 28th	vs PIT	Jared Jones (2-6)	#55	@ WSH	Jackson Kent (1-2)	#177
Sat, Aug 29th	vs PIT	Lake Bachar (1-3)	#283	@ WSH	Cade Cavalli (12-5)	#54
Sun, Aug 30th	vs PIT	Braxton Ashcraft (14-5)	#25	@ WSH	Andrew Alvarez (2-6)	#134
Tue, Sep 1st	@ LAD	Eric Lauer (8-7)	#264	@ KC	Randy Dobnak (2-3)	#429
Wed, Sep 2nd	@ LAD	Yoshinobu Yamamoto (12-8)	#10	@ KC	Noah Cameron (9-8)	#83
Thu, Sep 3rd	@ LAD	Tarik Skubal (8-7)	#2	@ KC	Michael Wacha (9-8)	#75
Fri, Sep 4th	@ COL	Ryan Feltner (5-9)	#431	vs CHC	Shota Imanaga (8-10)	#27
Sat, Sep 5th	@ COL	Mason Adams (0-0)	#338	vs CHC	Clay Holmes (6-6)	#52
Sun, Sep 6th	@ COL	Tanner Gordon (1-4)	#420	vs CHC	Matthew Boyd (8-3)	#37
Mon, Sep 7th	@ SF	Landen Roupp (8-13)	#97	vs NYM	Robert Stock (1-3)	#174
Tue, Sep 8th	@ SF	Blade Tidwell (0-2)	#173	vs NYM	Sean Manaea (4-7)	#70
Wed, Sep 9th	@ SF	Matt Wilkinson (0-2)	#167	vs NYM	Nolan McLean (10-8)	#30
Fri, Sep 11th	vs CWS	Anthony Kay (9-7)	#161	vs LAD	Justin Wrobleski (11-5)	#118
Sat, Sep 12th	vs CWS	Sean Burke (8-6)	#67	vs LAD	Tyler Glasnow (4-0)	#16
Sun, Sep 13th	vs CWS	Davis Martin (9-6)	#110	vs LAD
Mon, Sep 14th	vs SF			@ ARI
Tue, Sep 15th	vs SF			@ ARI
Wed, Sep 16th	vs SF			@ ARI
Fri, Sep 18th	vs WSH			@ SD
Sat, Sep 19th	vs WSH			@ SD
Sun, Sep 20th	vs WSH			@ SD
Tue, Sep 22nd	@ PIT			@ CHC
Wed, Sep 23rd	@ PIT			@ CHC
Thu, Sep 24th	@ PIT			@ CHC
Fri, Sep 25th	@ MIL			vs ATL
Sat, Sep 26th	@ MIL			vs ATL
Sun, Sep 27th	@ MIL			vs ATL
Fri, Mar 27th				vs COL	Kyle Freeland (4-10)	#394
Thu, Apr 9th				vs CIN	Rhett Lowder (6-8)	#214
Tue, May 5th				vs BAL	Chris Bassitt (6-4)	#154
Mon, May 18th				vs ATL	JR Ritchie (1-2)	#371
Fri, May 22nd				vs NYM	Tobias Myers (0-2)	#221
Sun, May 24th				vs NYM	Christian Scott (4-4)	#53
Sat, Jun 20th				vs SF	Trevor McDonald (3-7)
Mon, Jun 29th				@ COL	Sean Sullivan (0-3)	#419
Thu, Aug 6th				@ ATL	Martin Perez (8-8)	#191
Thu, Aug 13th				vs PIT	Braxton Ashcraft (14-5)	#25
Mon, Aug 24th				vs BOS	Ranger Suarez (5-4)	#28
Mon, Aug 31st				@ WSH	Will Dion (1-1)	#126